Railway brake-shoe.



.0. 0 wu... ma 6 n U l. d 8 .I n 8 t a P :.J om .H1 VIS, E w LE. PK IIAJWS Bm .Yn WAm .wm Gum AA R( 3 4, d 6 0. ,N

2 Sheets-Sheet 2- (No Model.)

NiTnD STATES lPari-nvr OFFICE.

GARDINER NV. CHIPLEY, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TOCHARLES WV. ARMBRUST, OF SAME PLACE.

RAILWAY BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 651,435, dated June 12,1900.

Application filed January 18, 1900. Serial. No. 1,871. (No model.)

T0 all whom L'v' may concern.-

Be it known that I, GARDINER W. CHIPLEY, a citizen of the United Statesof America, residing at Chicago, in the county of Cook, in the State ofIllinois, have invented a certain new and useful Improvement in RailwayBrake-Shoes, of which the following is a description, reference beinghad to the accompanying drawings, forming a part of this specification.

The first feature of .my invention relates to the provision of a dividedor two-part brakeshoe by which certain advantages hereinafter explainedare attained, and its second feature relates to the provision of abrake-shoe adapted to receive and have attached to it the back or rearportion of a partially-worn shoe, whereby partially-worn shoes may beused completely up by attaching them to and using them with new shoes,as hereinafter explained.

In the accompanying drawings, Figurel is a middle longitudinal sectionof a plain castiron divided brake-shoe embodying the first feature of myinvention; Fig. 2, a corresponding view of a similar shoe embodying alsothe second feature of my invention; Fig. 3, a view corresponding to Fig.2, showing a partially-worn shoe applied to the shoe of Fig. 2; Fig. 4,a perspective view of the two cooperating halves of a new and apartiallyworn shoe, illustrating the manner of assembling the two andsecuring them together; and'Fig. 5, a perspective view of the inner ormiddle ends of the shoes shown in Fig. 4, also illustrating the mannerof assembling and securing them together.

The same letters of reference areused to indicate corresponding parts inthe several views.

The two halves A B of the divided shoe (shown in Fig. l) have plainwearing-faces a of the brake-head. Both sets of lugs will be hereinafterreferred to as the guide-lugs.

When the two halves A B of the shoe are placed together as in Fig. 1,their workingfaces a alie in the arc of the same circle; but theabutting ends of the two halves of the shoe are preferably so shaped asnot to abut flatly together throughout their adjacent faces, anoutwardly-flaring open space 6o being left between the rear portions ofsaid faces for the purpose of more readily permitting independentmovement of the two halves of the shoe when attached to the brake-head.

As is well known in the practical use of brake-shoes, the entire workingface of the shoe is rarely pressed uniformly against the surface of thewheel when the brakes are set, owing to imperfect adjustments and tounequal wear upon the faces of the shoes. In 7o the use of solid orcontinuous shoes the shoe is practically fulcrumed upon the brake-headat its middle, where it is secured to the brakehead lby theattaching-lug and key, with the result that when in setting the brakesone end of the shoe is` forced against the wheel before its opposite endcontacts with the wheel the shoe is subjected to a strain which oftenbreaks it after it has become worn and weakened. By forming the shoe intwo separate 8o halves, as in Fig. l, and permitting slight independentplay of the two halves this objection to solid or continuous shoes isovercome, since the forcing of one half of the shoe against the wheel inadvance of the other pro- 8 5 duces no strain upon the shoe.

Another' advantage of the divided shoe is that when one half of the shoebecomes worn to a materially greater extent than the other,

vas Very frequently happens in theuse of 9o brake-shoes, such worn halfmay be removed and replaced by another less-worn half, thereby restoringthe uniformity of the two halves of the shoe.

Fig. 2 and the succeeding figures of the 95 drawings illustrate thesecond feature of my invention. As there shown, the two halves A B ofthe shoe are provided at their abutting ends with a recess c, extendinginward from the face of the shoe opposite the attachroo ing-lug C on theback of the shoe, and projecting into each side of such recess from therespective halves of the shoe are two lugs d. This recess c is adaptedto receive the attachinglug C upon the back of a worn shoe, Fig. 3, andthe lugs il are adapted to enter the keyway in such attaching-lug, andthereby lock the worn shoe to the newoue. The two halves of the shoe arelikewise provided near their outer ends with recesses e, extendinginward from the face of the shoe and adapted to receive the guide-lugs DE upon the back ot' the worn shoe, as shown in Fig. 3, and for thepurpose of locking the ends ot' the worn shoe to the ends of the newshoe the lugs E upon the back of the shoe are provided upon their outerfaces with recesses f, adapted to be engaged by lugs g, projecting intothe recesses c in the face of the shoe.

The back of the shoe is formed in an are having the same radius as thatof the face of the shoe, so that the back ot' one shoe will lit the faceot another shoe.

In assembling the parts each half ot' the worn shoe is applied to andinterlocked with the corresponding half of the new shoe independently ofthe opposite halves of the shoes, and when each halt' of the combinedshoe has been thus assembled the two halves of the combined shoe arebrought together end to end, as in lFig. 3, and then secured to thebrake-head.

Figs'. 4 and 5 illustrate the manner oi combining the respective halvesof the new and old shoes, the face ot the new shoe and its recesses andthe back of the old shoe with its projecting lugs being shown in Fig.4:. The back of the old shoe is placed against the face of the new shoe,with the attaching and guiding lugs in their recesses in the face of thenew shoe, but with the outer end of the new shoe projecting outwardlyslightly beyond the end of the old shoe, and the latter is then slidoutwardly along the face of the new shoe to cause the lugs g and CZ inthe recesses in the face of the new shoe to engage the recess f andkeyway b in the lugs upon the back of the old shoe, and thereby lock thelatter to the former, as will be readily understood.

A worn shoe of the style shown in Fig. l may be combined with a new shoeof the style shown in Fig. 2 as readily as can a worn sh'oe of thelatter style, and in Fig. 3 it may be assumed that the worn shoe thereshown is, in fact, the shoe of Fig. 1. Indeed, owing to the fact thatthe shoe of Fig. l has an unbroken wearing-surface it will under somecircumstances be found advantageous to einploy the two styles of shoestogether, the shoe of Fig. 2 serving as a means for completely using upthe worn shoes of the style shown in Fig. l.

While I have illustrated and described in detail a simple and efiicientmethod ot' attaching the worn shoes to the new ones by interlocking themtogether, my invention is not restricted in its broader scope to thisparticular method and means oi' attaching the old shoe to the new one,since, so far as I am aware, it has not heretofore been proposed to useup worn brake-shoes by attaching them to new shoes in any mannerwhatsoever, and my invention therefore contemplates the employment ofany suitable means for securing the old shoes to the new ones in thepractical utilization of this idea.

It will be understood that my invention has nothing to do with theparticular construction of the body of the shoei'. c., whether of solidcast metal or otherwise-or with the employment or non-employment ofinserts in the wearing-face of the shoe. Any of the various methods ofconstructing the body of the shoe and any of the usual inserts may beemployed in connection with my invention without affecting the latter.It will also be understood that the second feature of my invention maybe utilized in solid or continuous shoes, it being simply necessary forsuch purpose to provide suitable means for securing the old and newshoes together when assembled.

I'Iaving thus fully described my invention, I claiml. A brake-shoecomposed ot' two independent halves abutting together on a transverseline at the middle of the shoe and each provided with means forattachingit to the brakehead, substantially as described.

2. A brake-shoe composed of two independent halves separated from eachother on a transverse line at the middle of the shoe and each providedwith a guiding-lug and with one-half of a two-part attaching-lug,subtantially as described.

The herein'- described divided brakeshoe, composed of the two halves A Bseparated from each other on a transverse line at the middle of the shoeand each provided with a guiding-lug D E and with one-halt of a two-partattaching-lug C having a keyway ZJ, substantially as described.

4. A brake-shoe provided in its wearingface with recesses adapted toreceive the attaching and guide lugs upon the back of another shoe,substantially as described.

5. A brake-shoe provided in its wearingface with recesses adapted toreceive the guide and attaching lugs on the back of another shoe, andwith means for securing the two shoes together, substantially asdescribed.

6. A brake-shoe having its wearing-face and its back formed in parallelplanes, so that the back of one shoe will fit the face of another shoe,and provided in its wearing-face ,with recesses adapted to receive theattaching and guide lugs upon the back of another shoe, substantially asdescribed.

'7. A two-part or divided brake-shoe, composed of two halves separatedtransversely at the middle of the shoe, and adapted to have the back ofanother shoe secured to its face, substantially as described.

8. A two-part or divided brake-shoe, composed oi two halves separatedupon a trans- IOO IIO

IZO

verse middle line, and provided in its Wearing-face with recessesadapted to receive the attaching and guide lugs upon the back of anothershoe, substantially7 as described.

9. A two-part or divided brake-shoe, composed of twophalves separatedupon a transverse middle line, and provided .in its Wearing-face withrecesses adapted to receive the attaching and guide lugs upon the backof another shoe and with means for securing the two shoes together,substantially as described.

10. A two-part or divided brake-shoe, composed of tWo halves separatedupon'atransverse middle line, and provided with recesses in itswearing-face adapted to receive the attaching and guide lugs upon theback of another shoe, and with lugs projectinginto said recesses andadapted to cooperate with the lugs upon the back of the other shoe tolock the two shoes together, substantially as described.

11. A two-part or divided brake-shoe separated upon a transverse middleline and having its wearing-face and back formed in parallel planes, sothat the back of one shoe will lit the face of another shoe, and havingits- Wearing-face provided with recesses adapted to receive theattaching and guide lugs upon the back of the other shoe, substantiallyas described.

12. A two-part or divided brake-shoe separated upon a transverse middleline andhaving its wearing-face and back formed in parallel planes, sothat the back of one shoe will t the face of another shoe, and havingits Wearing-face provided with recesses adapted to receive the attachingand guide lugs upon the back of the other shoe and with lugs projectinginto such recesses and adapted to c0- operate with the attaching andguide lugs upon the back of the other shoe, substantially 13. The herein-described two-part or divided brake-shoe, composed of the halves A Bprovided in their wearing-faces With the recesses c e and the lugs d gprojecting into said recesses, and provided -upon their-.backs With theattaching-lug G having the keyway b, and with the guide-lugs D E havingthe recesses f, substantially as and for the purpose specilied.

14. A brake-shoe adapted to engage a wheel and composed of twoindependent substantially-like halves abutting together on a trans'-verse line at the middle of the shoe, substantially as described.

GARDINER W. CHIPLEY.

Witnesses: y

LEoNoRA WISEMAN,

EDWARD RECTOR.

